Clunking noise from rear...anyone else?

Every once in a while I'll get a clunking noise from what seems to be the rear right area of the car. It almost sounds like two pieces of loose metal hitting each other...and it's kind of random. I know it's basically impossible to diagnose a sound over the internet, but I was just wondering if anyone else had experienced this or had any idea where I could look? I looked at the sway bar and everything looks fine there...I also moved the exhaust around a bit, and didn't hear the sound, do I don't think it's coming from that. I can't really even tell if it's inside or outside of the car, but it's definitely coming from the back somewhere.

Any ideas? I'm stumped

i know you said that you looked at the rsb but did you tighten it. i've had mine loosen up and it sounds like the jack is loose (metal hitting metal). Just check the nuts to see if they are tight its probably that.

And put some Loc-Tite on 'em.